Centrifugal pump



G. H. ANDERSON.

CENTRIFUGAL PUMP. APPLICATION FILED N0v.2I,I9 Ia Patented May 24, 1921.

It] I-WUWIM GEORGE H. HNDERSON Qttomaq:

UNITED" STATES GEORGE H. ANDERSON, F BATTLE CREEK, MICHIGAN'.

GENTRIFUGAL I PUMP.

Specification of Letters Patent.

Patented May 24, 1921.

Application filed November 21, 1918. Serial No. 263,448.

To all whom it may concern:

Be it known that I, GEORGE H. ANDERSON, a citizen of the United States, residing at Battle Creek, county of Calhoun, State of Michigan, have invented certain new and useful Improvements in Centrifugal Pumps, of which the following is a specification.

This invention relates to improvements in centrifugal pumps.

The main object of this invention is to provide an improved means for automatically balancing and centering the impeller.

Further objects, and objects relating to structural details, will definitely appear from the detailed description to follow.

I accomplish the objects of my invention by the devices and means described in the following specification. The invention is clearly defined and pointed out in the claims.

A structure which is a preferred embodiment of my invention is clearly illustrated in the accompanying drawing, forming a part of this specification, in which:

Figure I is a detail perspective view mainly in longitudinal section of a structure embodying the features of my invention.

Fig. II is a detail section on a line corresponding to line 2-2 of Fig. I showing structural details. 7

In the drawing similar reference characters refer to similar parts throughout both views.

Referring to the numbered parts of the 85 drawing, 1 represents the base and 2 the flange for connection to the discharge. The casing 4 is provided with an inlet chamber 5 and the peripheral discharge 6.

The bearings for the impeller shaft 7 are not illustrated. The water seal stufflng boxes or packing; 8 are substantially those shown in my atent #1,238,7 31, issued Sept. 4, 1917. Diflusion vanes 9 are provided to coact with the impeller 10.

5 The impeller 10 is grooved to its periphery with a V shaped groove and the diffusion vane has a corresponding projection coacting with said peripheral groove.

The impeller 10 is provided with cylin drical flanges 11 at each end, tapered as shown. The casing has cylindrical portions 12 surrounding the flanges 11 and spaced therefrom, the cylindrical portions 12 being shouldered at 13. Annular members 14 are disposed between the casing and flanges and provided with peripheral shoulders 15 coacting with the shoulders of the casing. The members 14: are beveled on their inner sides to coact with the flanges of the impeller. These annular members 14 are floating members, that is, there is sufficient space provided between the parts to allow for a lateral movement of the annular members and, being subject to the varying pressures or forces of the water, they are shifted thereby, increasing or diminishing the portage on one side or the other of the impeller as the case may be, so that the impeller is effectively balanced.

The members 14 are provided with lugs 16 at one side engaging recesses 17 in the casing whereby rotation of the members is prevented at the same time permitting their free action.

I have not attempted to illustrate or describe various adaptations of my invention which I contemplate as I believe the disclosure made will enable those skilled in the art to which my invention relates to embody or adapt the same as may be desired.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is: V

1. In a centrifugal pump, the combination with a casing, of a rotary impeller having outwardly tapered annular flanges at each end, said casing having cylindrical shoulders spaced from said impeller flanges, and floating annular members beveled on their inner sides to correspond to the taper of said flanges and peripherally shouldered to coact with said shoulders on said casing, as specified.

2. In a centrifugal pump, the combination with a casing, of a rotary impeller having an outwardly tapered annular end flange, said casing having a cylindrical shoulder spaced from said impeller flange, and a floating annular member beveled on its inner side to correspond to the taper of said flange and peripherally shouldered to coact with said shoulder on said casing, as specified.

3. In a centrifugal pump, the combination with a casing of a rotary impeller with V shaped peripheral groove and having annular flanges at each end, diffusion vanes with projections to coact with said peripheral groove, said casing having cylindrical shoulders spaced from said impeller flanges and floating annular members coaeting with said flanges, and peripheral shoulders to coact with said shoulders and said casing as I specified.

4. In a centrifugal pump, the combination with a casing of a rotary impeller with V shaped peripheral groove and having outwardly tapered annular flanges at each end, difiusion vanes with projections to oo- 10 act with said peripheral groove, said casing having annular shoulders spaced from said GEORGE H. ANDERSON. 1 8.]

' Witnesses:

LUELLA G. GREENEIELD, MARGARET L. GLASGOW. 

